FCFG format in BNFC

1 files changed, 210 insertions, 0 deletions

diff --git a/src/GF/FCFG/PrintFCFG.hs b/src/GF/FCFG/PrintFCFG.hs
new file mode 100644
index 000000000..7489227a7
--- /dev/null
+++ b/src/GF/FCFG/PrintFCFG.hs
@@ -0,0 +1,210 @@
+{-# OPTIONS -fno-warn-incomplete-patterns #-}
+module GF.FCFG.PrintFCFG where
+
+-- pretty-printer generated by the BNF converter
+
+import GF.FCFG.AbsFCFG
+import Data.Char
+
+-- the top-level printing method
+printTree :: Print a => a -> String
+printTree = render . prt 0
+
+type Doc = [ShowS] -> [ShowS]
+
+doc :: ShowS -> Doc
+doc = (:)
+
+render :: Doc -> String
+render d = rend 0 (map ($ "") $ d []) "" where
+  rend i ss = case ss of
+    "["      :ts -> showChar '[' . rend i ts
+    "("      :ts -> showChar '(' . rend i ts
+    "{"      :ts -> showChar '{' . new (i+1) . rend (i+1) ts
+    "}" : ";":ts -> new (i-1) . space "}" . showChar ';' . new (i-1) . rend (i-1) ts
+    "}"      :ts -> new (i-1) . showChar '}' . new (i-1) . rend (i-1) ts
+    ";"      :ts -> showChar ';' . new i . rend i ts
+    t  : "," :ts -> showString t . space "," . rend i ts
+    t  : ")" :ts -> showString t . showChar ')' . rend i ts
+    t  : "]" :ts -> showString t . showChar ']' . rend i ts
+    t        :ts -> space t . rend i ts
+    _            -> id
+  new i   = showChar '\n' . replicateS (2*i) (showChar ' ') . dropWhile isSpace
+  space t = showString t . (\s -> if null s then "" else (' ':s))
+
+parenth :: Doc -> Doc
+parenth ss = doc (showChar '(') . ss . doc (showChar ')')
+
+concatS :: [ShowS] -> ShowS
+concatS = foldr (.) id
+
+concatD :: [Doc] -> Doc
+concatD = foldr (.) id
+
+replicateS :: Int -> ShowS -> ShowS
+replicateS n f = concatS (replicate n f)
+
+-- the printer class does the job
+class Print a where
+  prt :: Int -> a -> Doc
+  prtList :: [a] -> Doc
+  prtList = concatD . map (prt 0)
+
+instance Print a => Print [a] where
+  prt _ = prtList
+
+instance Print Char where
+  prt _ s = doc (showChar '\'' . mkEsc '\'' s . showChar '\'')
+  prtList s = doc (showChar '"' . concatS (map (mkEsc '"') s) . showChar '"')
+
+mkEsc :: Char -> Char -> ShowS
+mkEsc q s = case s of
+  _ | s == q -> showChar '\\' . showChar s
+  '\\'-> showString "\\\\"
+  '\n' -> showString "\\n"
+  '\t' -> showString "\\t"
+  _ -> showChar s
+
+prPrec :: Int -> Int -> Doc -> Doc
+prPrec i j = if j<i then parenth else id
+
+
+instance Print Integer where
+  prt _ x = doc (shows x)
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , prt 0 xs])
+
+
+instance Print Double where
+  prt _ x = doc (shows x)
+
+
+instance Print Ident where
+  prt _ (Ident i) = doc (showString i)
+
+
+
+instance Print FGrammar where
+  prt i e = case e of
+   FGr frules -> prPrec i 0 (concatD [prt 0 frules])
+
+
+instance Print FRule where
+  prt i e = case e of
+   FR abstract fsymbolss -> prPrec i 0 (concatD [prt 0 abstract , doc (showString ":=") , prt 0 fsymbolss])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , doc (showString ";") , prt 0 xs])
+
+instance Print Abstract where
+  prt i e = case e of
+   Abs fcat fcats name -> prPrec i 0 (concatD [prt 0 fcat , doc (showString "->") , prt 0 fcats , doc (showString ".") , prt 0 name])
+
+
+instance Print FSymbol where
+  prt i e = case e of
+   FSymCat fcat n0 n -> prPrec i 0 (concatD [doc (showString "(") , prt 0 fcat , prt 0 n0 , prt 0 n , doc (showString ")")])
+   FSymTok str -> prPrec i 0 (concatD [prt 0 str])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , prt 0 xs])
+
+instance Print FCat where
+  prt i e = case e of
+   FC n id pathelss pathterms -> prPrec i 0 (concatD [doc (showString "(") , prt 0 n , prt 0 id , doc (showString "[") , prt 0 pathelss , doc (showString "]") , doc (showString "[") , prt 0 pathterms , doc (showString "]") , doc (showString ")")])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , prt 0 xs])
+
+instance Print PathEl where
+  prt i e = case e of
+   PLabel label -> prPrec i 0 (concatD [prt 0 label])
+   PTerm term -> prPrec i 0 (concatD [prt 0 term])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , doc (showString ".") , prt 0 xs])
+
+instance Print PathTerm where
+  prt i e = case e of
+   PtT pathels term -> prPrec i 0 (concatD [doc (showString "(") , prt 0 pathels , doc (showString ",") , prt 0 term , doc (showString ")")])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , prt 0 xs])
+
+instance Print Name where
+  prt i e = case e of
+   Nm id profiles -> prPrec i 0 (concatD [prt 0 id , doc (showString "[") , prt 0 profiles , doc (showString "]")])
+
+
+instance Print Profile where
+  prt i e = case e of
+   Unify ns -> prPrec i 0 (concatD [doc (showString "[") , prt 0 ns , doc (showString "]")])
+   Const forest -> prPrec i 0 (concatD [prt 0 forest])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , prt 0 xs])
+
+instance Print Forest where
+  prt i e = case e of
+   FMeta  -> prPrec i 0 (concatD [doc (showString "?")])
+   FNode id forestss -> prPrec i 0 (concatD [doc (showString "(") , prt 0 id , prt 0 forestss , doc (showString ")")])
+   FString str -> prPrec i 0 (concatD [prt 0 str])
+   FInt n -> prPrec i 0 (concatD [prt 0 n])
+   FFloat d -> prPrec i 0 (concatD [prt 0 d])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , prt 0 xs])
+
+instance Print Term where
+  prt i e = case e of
+   Arg n id pathels -> prPrec i 0 (concatD [doc (showString "(") , prt 0 n , prt 0 id , prt 0 pathels , doc (showString ")")])
+   Constr cident terms -> prPrec i 0 (concatD [doc (showString "(") , prt 0 cident , doc (showString "-") , prt 0 terms , doc (showString ")")])
+   Rec assocs -> prPrec i 0 (concatD [doc (showString "[") , prt 0 assocs , doc (showString "]")])
+   Proj term label -> prPrec i 0 (concatD [doc (showString "(") , prt 0 term , doc (showString ".") , prt 0 label , doc (showString ")")])
+   Tbl cases -> prPrec i 0 (concatD [doc (showString "[-") , prt 0 cases , doc (showString "-]")])
+   Select term0 term -> prPrec i 0 (concatD [doc (showString "(") , prt 0 term0 , doc (showString "!") , prt 0 term , doc (showString ")")])
+   Vars terms -> prPrec i 0 (concatD [doc (showString "[|") , prt 0 terms , doc (showString "|]")])
+   Concat term0 term -> prPrec i 0 (concatD [doc (showString "(") , prt 0 term0 , doc (showString "++") , prt 0 term , doc (showString ")")])
+   Tok str -> prPrec i 0 (concatD [prt 0 str])
+   Empty  -> prPrec i 0 (concatD [doc (showString "(") , doc (showString ")")])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , doc (showString ",") , prt 0 xs])
+
+instance Print Case where
+  prt i e = case e of
+   Cas term0 term -> prPrec i 0 (concatD [prt 0 term0 , doc (showString "=>") , prt 0 term])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , doc (showString ",") , prt 0 xs])
+
+instance Print Assoc where
+  prt i e = case e of
+   Ass label term -> prPrec i 0 (concatD [prt 0 label , doc (showString "=") , prt 0 term])
+
+  prtList es = case es of
+   [] -> (concatD [])
+   x:xs -> (concatD [prt 0 x , doc (showString ",") , prt 0 xs])
+
+instance Print Label where
+  prt i e = case e of
+   L id -> prPrec i 0 (concatD [prt 0 id])
+   LV n -> prPrec i 0 (concatD [doc (showString "$") , prt 0 n])
+
+
+instance Print CIdent where
+  prt i e = case e of
+   CIQ id0 id -> prPrec i 0 (concatD [prt 0 id0 , doc (showString ".") , prt 0 id])
+
+
+